humpty-dumpty
noun
hump·ty-dump·ty
¦həm(p)tē¦dəm(p)tē,
-ti...ti
plural -es
often capitalized H&D
: something that once damaged can never be repaired or made operative again
the exchange crisis … that brought the Humpty-Dumpty of currency stabilization tumbling 
Atlantic
Atlanticpeople fled into their suddenly Humpty-Dumpty world Robert O'Brien
Robert O'Brien
Word History
Etymology
after Humpty-Dumpty, egg-shaped nursery-rhyme character who fell from a wall and broke into bits